WhatsApp Recent Changes Take Up all iPhone Storage

Read this:

1. https://discussions.apple.com/thread/7480814?start=0&tstart=0
2. https://discussions.apple.com/thread/7480894?start=0&tstart=0
3. https://discussions.apple.com/thread/7480814?start=0&tstart=0
4. https://discussions.apple.com/thread/7482291?start=0&tstart=0

Solution:

1. WhatsApp - Settings - Account - Storage Usage - Refresh
2. Delete WhatsApp - Reinstall